What's the difference between high precision and traditional electronic navigation?

The biggest difference between high-precision maps and traditional navigation electronic maps lies in accuracy.

The accuracy of ordinary automobile electronic navigation maps is generally around 10 meter, while the accuracy of high-precision maps needs to reach 20 cm. This accuracy is basically the width of a lane sideline, and only the accuracy of 20 cm can ensure side collision.

In addition to accuracy, the difference between high-precision maps and traditional navigation electronic maps is also reflected in the following aspects:

First of all, the users are different. The users of traditional navigation electronic maps are mainly drivers, while the users of high-precision maps are mainly automatic driving systems.

Secondly, their data dimensions are different. The traditional navigation electronic map only records the road level data, such as road shape, slope, curvature, pavement, direction and so on. The high-precision map not only includes the above contents, but also adds data related to lane attributes (lane line type, lane width, etc. ), such as overhead objects, fences, trees, road edge types, roadside landmarks and a large number of target data.

Finally, the real-time data are different. The update frequency of traditional navigation electronic map is permanent static data (update frequency is about 1 month) and semi-permanent static data (frequency is 1 hour). However, high-precision maps require high real-time data, and the update frequency is usually semi-dynamic data (frequency 1 min) and dynamic data (frequency 1 sec).